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Diversity-multiplexing tradeoff in mode-division multiplexing.

Sercan Ö Arık, Joseph M Kahn

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    |May 31, 2014
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    Summary
    This summary is machine-generated.

    Mode-division multiplexing (MDM) systems face a tradeoff between multiplexing gain and diversity gain. This study reveals how signal-to-noise ratio and mode-dependent loss impact this fundamental relationship in MDM.

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    Area of Science:

    • Optical Communications
    • Information Theory

    Background:

    • Mode-division multiplexing (MDM) systems offer increased capacity by utilizing multiple spatial modes.
    • System capacity is fundamentally limited by mode-dependent loss (MDL) and gain, affecting outage probability.
    • Exploiting modal degrees of freedom presents a tradeoff between multiplexing gain (transmission rate) and diversity gain (outage probability).

    Purpose of the Study:

    • To present the diversity-multiplexing tradeoff in MDM systems for the first time.
    • To analyze the influence of signal-to-noise ratio (SNR), MDL, and frequency diversity order on this tradeoff.
    • To investigate the tradeoff within the strong-mode-coupling regime.

    Main Methods:

    • Theoretical analysis of the diversity-multiplexing tradeoff in MDM systems.
    • Mathematical modeling considering SNR, MDL, and frequency diversity order.
    • Focus on the strong-mode-coupling regime to understand fundamental limits.

    Main Results:

    • The study quantifies the diversity-multiplexing tradeoff in MDM systems.
    • It demonstrates the impact of SNR and MDL on achievable gains.
    • The influence of frequency diversity order on the tradeoff is elucidated.

    Conclusions:

    • A fundamental tradeoff exists between multiplexing and diversity gains in MDM systems.
    • SNR and MDL significantly influence the achievable performance.
    • Understanding this tradeoff is crucial for optimizing MDM system design and capacity.